Description
A worn or damaged piston directly kills your sled’s throttle response and fuel efficiency—and replacement with mismatched components only compounds the problem. The Wiseco SK1205 kit solves this by delivering a complete, factory-matched assembly engineered specifically for your MX-Z 440, eliminating guesswork and compatibility headaches. You get OEM-quality performance restoration with the durability to handle aggressive riding season after season.
What sets this kit apart is the engineering approach: Wiseco’s high-silicone forged aluminum resists the thermal cycling that kills standard pistons, while the included rings, wrist pins, and circlips are all calibrated to work as a system. This means consistent compression, reliable sealing, and the kind of snap-off-the-line acceleration that reminds you why you ride.
- High-silicone forged aluminum
- Minimized thermal expansion
- 2-cycle optimized
- Complete kit assembly
- Piston, rings included
- Wrist pins, circlips included
- Gasket seal included
- Wiseco-spec rings only
- 1995–1998 MX-Z 440
- Bolt-on installation
- MPN: SK1205
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